Revert of Expose SIMD.Float32x4 type to Javascript.

src/mips64/code-stubs-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 273 matching lines @@
   // Test for NaN. Sadly, we can't just compare to Factory::nan_value(),
   // so we do the second best thing - test it ourselves.
   // They are both equal and they are not both Smis so both of them are not
   // Smis. If it's not a heap number, then return equal.
   __ GetObjectType(a0, t0, t0);
   if (cc == less || cc == greater) {
     // Call runtime on identical JSObjects.
     __ Branch(slow, greater, t0, Operand(FIRST_SPEC_OBJECT_TYPE));
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ Branch(slow, eq, t0, Operand(SYMBOL_TYPE));
-    // Call runtime on identical SIMD values since we must throw a TypeError.
-    __ Branch(slow, eq, t0, Operand(FLOAT32X4_TYPE));
     if (is_strong(strength)) {
       // Call the runtime on anything that is converted in the semantics, since
       // we need to throw a TypeError. Smis have already been ruled out.
       __ Branch(&return_equal, eq, t0, Operand(HEAP_NUMBER_TYPE));
       __ And(t0, t0, Operand(kIsNotStringMask));
       __ Branch(slow, ne, t0, Operand(zero_reg));
     }
   } else {
     __ Branch(&heap_number, eq, t0, Operand(HEAP_NUMBER_TYPE));
     // Comparing JS objects with <=, >= is complicated.
     if (cc != eq) {
     __ Branch(slow, greater, t0, Operand(FIRST_SPEC_OBJECT_TYPE));
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ Branch(slow, eq, t0, Operand(SYMBOL_TYPE));
-    // Call runtime on identical SIMD values since we must throw a TypeError.
-    __ Branch(slow, eq, t0, Operand(FLOAT32X4_TYPE));
     if (is_strong(strength)) {
       // Call the runtime on anything that is converted in the semantics,
       // since we need to throw a TypeError. Smis and heap numbers have
       // already been ruled out.
       __ And(t0, t0, Operand(kIsNotStringMask));
       __ Branch(slow, ne, t0, Operand(zero_reg));
     }
       // Normally here we fall through to return_equal, but undefined is
       // special: (undefined == undefined) == true, but
       // (undefined <= undefined) == false!  See ECMAScript 11.8.5.
@@ skipping 5298 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64